electro-music.com   Dedicated to experimental electro-acoustic
and electronic music
 
    Front Page  |  Radio
 |  Media  |  Forum  |  Wiki  |  Links
Forum with support of Syndicator RSS
 FAQFAQ   CalendarCalendar   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   LinksLinks
 RegisterRegister   ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in  Chat RoomChat Room 
go to the radio page Live at electro-music.com radio 1 Please visit the chat
poster
 Forum index » DIY Hardware and Software » Jürgen Haible designs
Living VCOs
Post new topic   Reply to topic Moderators: fonik, Scott Stites
Page 21 of 21 [520 Posts]
View unread posts
View new posts in the last week
Mark the topic unread :: View previous topic :: View next topic
Goto page: Previous 1, 2, 3, ..., 19, 20, 21

Would you prefer one PCB with 3 VCOs a la JH-5A, or 1 VCO per PCB with more features
One PCB with Oscillator Driver and 3 VCO cores (like JH-5A - cheap!)
60%
 60%  [ 62 ]
1 PCB = 1 VCO (with many waveforms and inputs)
39%
 39%  [ 41 ]
Total Votes : 103

Author Message
saint gillis



Joined: Apr 21, 2012
Posts: 60
Location: Brussels

PostPosted: Thu Jun 07, 2012 6:03 am    Post subject: Reply with quote  Mark this post and the followings unread

Thanx for your precious help! Although the result seems very satisfying I m sure it can be tweaked again by really qualified people, I ll tell you if I see collateral damages using syncro Smile
Back to top
View user's profile Send private message
saint gillis



Joined: Apr 21, 2012
Posts: 60
Location: Brussels

PostPosted: Sun Jul 08, 2012 9:21 pm    Post subject: Reply with quote  Mark this post and the followings unread

Hello!
Just to tell that I m using it very often and it really works very well! Very Happy
Back to top
View user's profile Send private message
bennethos



Joined: Apr 18, 2009
Posts: 31
Location: Belgium

PostPosted: Mon Dec 31, 2012 8:09 am    Post subject: waveshaper Reply with quote  Mark this post and the followings unread

Hey guys,

I would like to include some other waveshapes besides the default Pulse & saw.

Which one would you guys consider ?

thx
Back to top
View user's profile Send private message
saint gillis



Joined: Apr 21, 2012
Posts: 60
Location: Brussels

PostPosted: Tue Jan 01, 2013 7:15 am    Post subject: Reply with quote  Mark this post and the followings unread

Hello! I've not tried myself to add waveforms, but maybe you can find some great infos on Bill & Will's page, if you haven't seen it before..
http://www.dragonflyalley.com/constructionJHLivingVCO.htm
Back to top
View user's profile Send private message
The Peasant



Joined: Nov 13, 2009
Posts: 99
Location: Sunny Alberta
Audio files: 1

PostPosted: Tue Jan 01, 2013 11:16 am    Post subject: Reply with quote  Mark this post and the followings unread

There is a schematic for adding triangle and sine outputs on page 12 of this thread and a stripboard layout for that on page 17.

Take care,
Doug

_________________
The Electronic Peasant

www.electronicpeasant.com
Back to top
View user's profile Send private message Visit poster's website
The Bad Producer



Joined: Mar 08, 2009
Posts: 282
Location: The Manhole

PostPosted: Tue Jan 01, 2013 3:49 pm    Post subject: Reply with quote  Mark this post and the followings unread

I added that circuit (thanks Peasant!) and it works really well, couldn't imagine the VCO's without the other waves!
_________________
http://loudestwarning.tumblr.com/
Back to top
View user's profile Send private message Visit poster's website
MarcMooga



Joined: Jan 31, 2013
Posts: 1
Location: Bremen

PostPosted: Thu Jan 31, 2013 6:21 am    Post subject: Reply with quote  Mark this post and the followings unread

Hi,

I am also about to finish the great sounding Living VCOs and I would like to add that Hard Sync feature.

My knowledge level is limited, but I am trying to improve day by day.
Here is my drawing... it would be great if anybody can confirm:

Posted Image, might have been reduced in size. Click Image to view fullscreen.

Thank you! Smile

regards,
Marc
Back to top
View user's profile Send private message
saint gillis



Joined: Apr 21, 2012
Posts: 60
Location: Brussels

PostPosted: Wed Feb 13, 2013 3:35 am    Post subject: Reply with quote  Mark this post and the followings unread

Hello Marc!
I don't have an original PCB made by the great Jurgen himself so I can't check myself if everything is correct, but it looks like there is a mistake where I ve put a red cross :
Posted Image, might have been reduced in size. Click Image to view fullscreen.

This part of the additional circuit should be connected on R20 resistor as you can see here (not on IC3's pin2) :

Posted Image, might have been reduced in size. Click Image to view fullscreen.
Back to top
View user's profile Send private message
oldenjon



Joined: May 18, 2012
Posts: 6
Location: Santa Cruz, CA

PostPosted: Sat May 18, 2013 2:08 pm    Post subject: Reply with quote  Mark this post and the followings unread

Any news about the availability of PCBs for this project? I'm very eager to build one.
Back to top
View user's profile Send private message
sonicwarrior



Joined: Dec 22, 2005
Posts: 266
Location: Cologne, Germany

PostPosted: Sun May 19, 2013 2:54 am    Post subject: Reply with quote  Mark this post and the followings unread

Nope, the existing PCB's can't be sold due to legal issues that are still unsolved.
=> http://electro-music.com/forum/post-369475.html#369475
Back to top
View user's profile Send private message
Luka



Joined: Jun 29, 2007
Posts: 1003
Location: Melb.

PostPosted: Tue May 21, 2013 3:26 am    Post subject: Reply with quote  Mark this post and the followings unread

there is a veroboard layout for it here

http://electro-music.com/forum/topic-56066.html

_________________
problemchild
melbourne australia
http://cycleofproblems.blogspot.com/
http://www.last.fm/user/prblmchild
Back to top
View user's profile Send private message
bIG joB heAd



Joined: Jul 11, 2013
Posts: 1
Location: France

PostPosted: Thu Jul 11, 2013 5:21 am    Post subject: Reply with quote  Mark this post and the followings unread

Hello,
i bought a filled PCB of a living VCO a few days ago.
I did the modifications to power it in +/-12V and it works like a charm and now i'd like to add the waveshapers but i'm a little confused about a few things.
As i understand, the waveshapers have an amp stage for each waveform so i can plug the outputs jacks directly there and use the spare amps on the driver section to amplify the pulse out.
Do i need to change some resistor values to adapt the waveshapers to 12V?
Thanks for any help Wink
Flavien
Back to top
View user's profile Send private message
evengravy



Joined: Aug 10, 2013
Posts: 3
Location: ireland

PostPosted: Sat Aug 10, 2013 4:10 am    Post subject: schematic error? Reply with quote  Mark this post and the followings unread

The schematic shows R40 trimmer referenced to +vb (+15v) and -vb (-15v) but the reference designator clearly has it referenced to GND and not -vb

can someone with more knowledge than I help? I'd like to build it on stipboard but the layout is also referenced to -vb and I cant be sure it's correct


R40 GND.jpg
 Description:
 Filesize:  84.32 KB
 Viewed:  1168 Time(s)
This image has been reduced to fit the page. Click on it to enlarge.

R40 GND.jpg


Back to top
View user's profile Send private message
sduck



Joined: Dec 16, 2007
Posts: 459
Location: Nashville
Audio files: 5

PostPosted: Sat Aug 10, 2013 6:15 pm    Post subject: Reply with quote  Mark this post and the followings unread

On the actual pcb, those connections are to ground, not -v
Back to top
View user's profile Send private message
evengravy



Joined: Aug 10, 2013
Posts: 3
Location: ireland

PostPosted: Sun Aug 11, 2013 10:34 am    Post subject: thanks Reply with quote  Mark this post and the followings unread

Thanks a lot for clearing that up, think I've got it cracked now can't wait to try it out!
Back to top
View user's profile Send private message
oldenjon



Joined: May 18, 2012
Posts: 6
Location: Santa Cruz, CA

PostPosted: Fri Aug 23, 2013 1:11 pm    Post subject: Reply with quote  Mark this post and the followings unread

Does anyone know if keeping the values of all resistors at 1% tolerance is critical in this circuit? Aside from the matched resistors of course.
Back to top
View user's profile Send private message
saint gillis



Joined: Apr 21, 2012
Posts: 60
Location: Brussels

PostPosted: Sat Feb 28, 2015 8:56 pm    Post subject: Reply with quote  Mark this post and the followings unread

Don't think so...
Back to top
View user's profile Send private message
numbertalk



Joined: May 05, 2008
Posts: 992
Location: Austin, TX
Audio files: 5

PostPosted: Mon Jan 25, 2016 8:50 pm    Post subject: Reply with quote  Mark this post and the followings unread

I built a 5U version of the Living VCOs circuit many years ago when JH first started selling the boards. I had never noticed this before but I am getting what I guess I'd call drift in the 3 oscillators. I remember this circuit being pretty stable, but now when I tune all 3 together with no detune on any of them, within seconds or a minute at most, they are each noticeably sharp or flat from each other. Not so out of tune that I couldn't play it, it's a nice an analog beating sound, but it's not what I'm tuning it for in this instance. Not looking for super stability but this is clearly not right.

I built it to his spec and used tempcos with thermal paste. It was particularly hot today, but I've had my modular on for 2-3 days and it's been a pretty consistent temperature all day. Could it be the verniers? I've noticed when I tune it using a strobe tuner that it seems almost a tiny bit sluggish at times to catch up with where I've tuned to. For example, if I'm trying to slightly bump it sharp because it's showing to be somewhat flat, it looks to me as though it gets to be just about in tune but then jumps a bit sharp. However even if I leave those alone and try to fine tune with the detune knob on each, it still ends up drifting. This isn't a scaling issue - I'm doing this to a single droning note I'm just trying to get all 3 VCOs tuned to in unison and I'm watching and hearing them drift out of tune rather quickly.

Any thoughts appreciated or suggestions much appreciated, thanks!
Back to top
View user's profile Send private message
saint gillis



Joined: Apr 21, 2012
Posts: 60
Location: Brussels

PostPosted: Wed May 17, 2017 4:25 am    Post subject: Reply with quote  Mark this post and the followings unread

Hi, the imageshack pics have disappeared, I think this was the synchro circuit : Posted Image, might have been reduced in size. Click Image to view fullscreen.
Back to top
View user's profile Send private message
cleaninglady



Joined: Dec 01, 2010
Posts: 13
Location: creeping up behind you...

PostPosted: Thu Oct 11, 2018 5:46 am    Post subject: Reply with quote  Mark this post and the followings unread

I'm in need of a little help with a Living VCO's build.

I made a standalone box using 3 of the Logicgate 2014 Barcode edition 1.3 Core PCB's and one of the Logicgate / Thomas Henry 2014 V1.1 Driver PCB's. I think these pcbs were original meant for a Euro build, which I'm not interested in. I need a standalone, easily transportable performance box
,
I'm finding it very difficult to find any pictures of the bare PCB's as I forgot to match resistors.

Also, I'm finding it impossible to find any calibration specifically for this set of PCB's. I know that some of the function will relate to the original calibration instructions but I'm wondering if anyone has built with these PCB's.


IMG_5166.JPG
 Description:
 Filesize:  2.55 MB
 Viewed:  676 Time(s)
This image has been reduced to fit the page. Click on it to enlarge.

IMG_5166.JPG


Back to top
View user's profile Send private message
Display posts from previous:   
Post new topic   Reply to topic Moderators: fonik, Scott Stites
Page 21 of 21 [520 Posts]
View unread posts
View new posts in the last week
Goto page: Previous 1, 2, 3, ..., 19, 20, 21
Mark the topic unread :: View previous topic :: View next topic
 Forum index » DIY Hardware and Software » Jürgen Haible designs
Jump to:  

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum


Forum with support of Syndicator RSS
Powered by phpBB © 2001, 2005 phpBB Group
Copyright © 2003 through 2009 by electro-music.com - Conditions Of Use